I am not sure. Usually when you add things that make commute faster (highways, more and faster trains, etc) people don't shorten their commute, they move farthe

I am not sure. Usually when you add things that make commute faster (highways, more and faster trains, etc) people don't shorten their commute, they move farther away (for less crowded neighbourhoods, cheaper housing costs, etc). I wouldn't be surprised if commute time hasn't changed much since horse and buggy days and all technological advancement has done is increase the distance while keeping the time constant.